<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    
<div id="app">
    <h2>{{firstName}} {{lastName}}</h2>
    <h2>{{firstName + ' ' + lastName}}</h2>
    <h2>{{getFullName()}}</h2>
    <h2>{{fullName}}</h2>
</div>


<script src="../js/vue.js"></script>
<script>
    const app = new Vue({
        el: '#app',
        data: { 
            massage: 'Hello Vue!',
            firstName: 'Lobarn',
            lastName: 'James'
        },
        // computed: 计算属性
        computed: {
            fullName: function() {
                return this.firstName + ' ' + this.lastName;
            }
        },
        methods: {
            getFullName: function() {
                return this.firstName + ' ' + this.lastName;
            }
        }
    })
</script>
</body>
</html>